﻿/*
 * TextServices / TSDotNet / TSNative
 * Marco Maria Bellocchi, Mauro Bampo
 * Copyright(c) 2013.
 * 
 * The MIT License
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */

using System;
using System.Collections.Generic;
using TSDotNet.Common;

namespace TSDotNet.Encoders
{
    public class SimpleCompositeZipper : ICompositeEncoder
    {
        private IList<IEncoder> _zippers = new List<IEncoder>();

        public void Add(IEncoder zipper)
        {
            if(_zippers.Contains(zipper))
                throw new ArgumentException(string.Format("Zipper {0} already contained!",zipper.Name));
            _zippers.Add(zipper);
        }

        public bool Contains(IEncoder zipper)
        {
            return _zippers.Contains(zipper);
        }

        public bool Remove(IEncoder zipper)
        {
            return _zippers.Remove(zipper);
        }

        public string Name
        {
            get { return "SimpleCompositeZipper"; }
        }

        public string Encode(string data)
        {
            if (string.IsNullOrEmpty(data))
                return null;
            string result = data;
            for(int i=0; i < _zippers.Count; i++)
            {
                result = _zippers[i].Encode(result);
            }
            return result;
        }

        public string Decode(string data)
        {
            if (string.IsNullOrEmpty(data))
                return null;
            string result = data;
            for (int i = _zippers.Count-1; i >= 0; i--)
            {
                result = _zippers[i].Decode(result);
            }
            return result;
        }
    }
}
